Narrowing the vocabulary gap in information retrieval

Computer Science

17Nov2017 12:00 - 13:00

PhD defence ceremony

Search engines rely heavily on term-based approaches. When presented with a search query, the engine ranks the relevance of documents according to the matching degrees between query and document terms. However, a high matching degree at term level does not necessarily mean high relevance and, vice versa, documents that do not match any query terms may still be relevant. In other words, there is a vocabulary gap between queries and documents. Christophe van Gysel explores ways of narrowing this gap by focusing on matching based on semantic concepts rather than lexical terms.

C.J.H. Van Gysel: Remedies against the Vocabulary Gap in Information Retrieval.


Prof. M. de Rijke


Dr E. Kanoulas


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Published by  University of Amsterdam